Tool to find malformed HTML?

Answer 1

This sounds like a job for HTML Tidy.

Answer 2

HTMLTidy will fix your errors

xmllint will find your errors

Answer 3

If you want a command line interface, you can use: https://github.com/yaniswang/HTMLHint

It has also its grunt plugin: https://github.com/yaniswang/grunt-htmlhint

Answer 4

https://addons.mozilla.org/en-US/firefox/addon/249 This firefox extension has done me good as well...

Answer 5

Even the W3C Validator will find your malformed/unclosed HTML.

I would, as a rule, always be sure to pass my HTML and CSS through their validators, though HTML Tidy is a nice little app to have around too.